MJCG compounds

[mjcg91]

Hi Everyone,

Since Bifrost is about to release, I thought it would be a good idea to share all the compounds I've made during the beta. Most of them are utility compounds, or related to strands, procedural modeling, etc.

I added the list of all the compounds bellow.

User::MJCG::Array
2D_to_1D_array
fill_interpolated
get_near_current_index
interpolate_on_array
pop
transpose_2D_array

User::MJCG::Display
draw_point_axis

User::MJCG::Geometry::Deformation
deform_by_uv

User::MJCG::Geometry::Mesh
create_mesh_from_uv
get_mesh_structure

User::MJCG::Geometry::points
create_3D_grid
create_mandelbrot
create_mandelbulb

User::MJCG::Geometry::strands
catmull_rom_strand
create_braid_along_strand
create_cardioid
create_circle
create_tube_along_strands
curl_strands
extrude_strands
update_strand_length
update_strand_orientation

User::MJCG::Math
angle_between
arc_length
average
distance_to
matrix_lerp
multiply_vector_by_matrix
multiply_vector_by_quaternion
normalize_quaternion
oscillator
quaternion_from_direction_and_upVector
quaternion_from_two_unit_vectors
rescale
resize_vector

User::MJCG::Rigging
mjBlendSpace_solver
mjEyelid_solver
mjLookAt_solver

Although I've updated it with the last script provided, please note that I did not test them myself as I cannot currently use either Maya or Bifrost from where I am. Hopefully everything works fine !

Cheers,
Maxime

[Christoph_Schaedl]

Thanks that great!

[Christoph_Schaedl]

I tried the eye_rig sample scene but i looks like its broken.

The eye lids are moved into invinity. I get them back if i disable the skincluster on the head geo.

But the eyelids wont follow at all.

[mjcg91]

Thanks for pointing this out, I haven't opened these scenes in a while.

It looks like there is a bug, but its not coming from the compound.  Somehow, the joints are not pulling the output matrix data.

If you connect a value node of type "Object" to the eyelid solvers's output, then it will work as expected.

[mjcg91]

MJCG compounds 1.2.0 is here!

I attached a zip file to this post. I wanted to upload it on the compound hub, but the file checked restricts me to do so: 

Invalid archive. Check the contents of your file: Archive has too many folders.

Anyway, here is the release note!

---------------------------------------------
v1.2.0 February 5, 2020

● "extrude_strands":
	● Has now 3 extrusion modes (Ribbon, Tube, Custom).
	● Is now working with multiple strands of variable size.
	● Is now generating clean, normalized UVs.
	● Is faster.
● "create_braids_from_strands": 
	● Is now working with multiple strands of variable size.
	● Fixed a rare glitch when the input strands had strong orientation changes.
	● Is faster.
● "update_strands_orientations": 
	● Has now 4 curve framing algorithms (Frenet, Up Vector, Parallel Transport, Double Reflection).
	● Is now working with multiple strands of variable size.
	● "up_vector" port is now overloadable. You can feed an array of vectors ( has to be the size as strand_count).
	● ability to use up-vectors from a custom property.
	● compute a correct tangent on the last strand points. 
● "catmull_rom_strands" is faster.
● "quaternion_from_direction_and_up_vector" now returns accurate results.
● Fixed node names that caused illegal name warnings.
● Added custom icon.

● New compound: "matrix_scope", a diagnostic tool to visualize transformation matrices as axis.
● New compound: "twist_strands", twists the strands basis vector and orientation along ther lenghts.
● New compound: "set_strands_orientations_from_closest_mesh", orients the strands's points based on a closest mesh's normals.
● New compound: "get_face_vertex_indices", returns the vertex indices associated to a face (given its index).
● New compound: "flatten_2D_array", an improved version of "convert_2D_to_1D_array", with multiple flattening modes.
● New compound: "flatten_3D_array", same as above, but for 3D array.
● New compound: "all_elements_true", returns true if all the elements of a given array<bool> are true.
● New compound: "all_elements_false", returns true if all the elements of a given array<bool> are false. 
● New compound: "get_strands_start_position", returns the first point of each strands.
● New compound: "set_point_ratio", simple set property node.
● New compound: "set_point_tangent", simple set property node.
● New compound: "get_point_binormal", simple get property node.
● New compound: "set_point_binormal", simple set property node.
● New compound: "get_point_orientation", simple get property node.
● New compound: "set_point_orientation", simple set property node.
● New compound: "get_strand_up_vector", simple get property node.
● New compound: "set_strand_up_vector", simple set property node.

● New sample scene: "strands_orientations_from_closest_mesh".

● Deleted "create_tubes_from_strands", now available as a "Tube" extrusion type using the "extrude_strands" compound.
● Deleted "interpolate_on_array",  better compound available in the "rebel-pack" as "get_from_interpolated_array".
● Deleted "update_strands_length", better compound available in the "rebel-pack" (same name).
● Deleted "convert_2D_to_1D_array", replaced by "flatten_2D_array".

Please don't hesitate to ask me if you have questions (some .md doc files are still missing). 

Enjoy

[juanjo_bernabeu]

O M G !!!!! This is superb!

Thanks Maxime!

[Christoph_Schaedl]

Thanks Maxime thats beyond cool! 

[Christoph_Schaedl]

They are beautiful! 

[juanjo_bernabeu]

Hey Maxime, how can I add more braids instead of three by defualt, I can´t find it.

I'm trying to use the node as a cloner  from the main guide to make cool strands with noise, like fibers.

[mjcg91]

If you want to generate strands around the each braid strands, you should use the "create_strands_around_strands" compound from the rebel pack. Just make sure to use "update_strands_ratio" before using it.

[juanjo_bernabeu]

Thanks maxime, I forgot completely.:)

[Christoph_Schaedl]

Thanks for the answer Maxime. 

But i have no idea what you mean with "connect a value node of type "Object" to the eyelid solvers's output".

I tried to find the right node but there is more than one eyelid solver.

Im confused by all this nodes.

[mjcg91]

You have to do it on the 4 eyelid solver graphs. Create a simple "value" node, set its data type to "Object", and plug it to the output port. Repeat for each eyelid graphs. once done, just move a controller and the rig will be behave as expected.

You can even delete the port and bifShape once the rig is working, but if you re-open the scene, you'll have do this workaround again. It was working without this workaround in the past, so I expect it will be fixed in a future version. Until then, you have to force the data to pull by having a bifShape pulling from the graph. 

[Christoph_Schaedl]

Thanks got it.

Thats sooo cool!

[mjcg91]

Hi guys,

here is a new version. It includes a new strands deformer and some bug fixes.

v1.3.0 February 11, 2020

● "update_strands_orientations":
	● Lifted Parallel Transport precision to avoid NaN errors in some cases.
	● Added tangents & orientations update options.
	● Double Reflection is now the default framing algorithm.
● "create_braids_from_strands": 
	● Now generates point_ratio.
	● Is faster.
● "create_circle", axis input was not working.

● New compound: "strands_deformer", Deforms geometry along strands. (similar to Maya's curveWrap).
● New compound: "set_strands_up_vector_from_closest_geometry", sets a "strand_up_vector" geo property, based on the closest geometry from the strands's starting points.

● New sample scene: "strands_deformer".

Bifrost team: Please lift the folder count limitation so that I can upload it on the compound hub. 

Enjoy

[Christoph_Schaedl]

That does look great. I cant follow you are to fast.

Could you tell me what limitation are you talking about?

You cant upload the compounds cause they have to much folder?

[jonah.friedman]

Incredible work @mjcg91, thank you for your continuing contributions to the community. I'll look into the folder count limitation for you asap. 

[marcus.nordenstam]

Amazing work, Maxime!

I'll do my best to work with the people responsible for this forum to see if we can change that limitation.

/marcus

[mjcg91]

Here is a minor update, which provides documentation for ALL compounds, a few bug fixes, and a new toy deformer.

---------------------------------------------
v1.3.1 February 24, 2020

● All compounds are now documented.	
● "strands_deformer": 
	● Fixed a bug with "keep_length" where input geometries longer than a strand would shrink.
	● "out_objects" is now a simple 1D array; removed extra output ports.
● "create_braids_from_strands", became extremely slow in 1.3.0, this is now resolved. 
● "set_strands_orientations_from_closest_geometry", modified computational method.
● Fixed "~can not be resolved", "~does not match a registered resolver" errors showing up in the script editor.

● New compound: "spherify_deformer", deforms any point based geometry into a spherical shape
● New compound: "get_point_scale", simple set property node.
● New compound: "set_point_scale", simple set property node.
● New compound: "get_point_length", simple get property node.
● New compound: "set_point_length", simple set property node.
● New compound: "get_strand_length", simple get property node.
● New compound: "set_strand_length", simple set property node.

● New sample scene: "spherify_deformer".

Enjoy

[jonah.friedman]

Hi Maxime,

The area team has removed the restrictions on folder structure. Can you try to upload again? 

Thank you,

Jonah

[mjcg91]

I was able to successful submit the compounds for review. Thanks a lot for forwarding the issue to the AREA team!